The arrowhead proteinase inhibitor A and B (APIA and APIB) are double headed and multifunctional. Both their primary structure and cDNA sequence have been elucidated.

• 慈菇蛋白酶抑制剂A和B(APIA和APIB)是一种双头多功能抑制剂 ,它们的一级结构和cDNA序列已经被阐明。